in diethyl ether (N2), acid soln. added to slurry, stirred for 1 h at room temp.; filtered, rinsed with ether, extracted with CH2Cl2, filtrate reduced to dryness in vac., recrytsd. from THF/ether;

triethyl amine in dichloromethane byproducts: {NEt3H}OTf, {NEt3H}PF6; (N2), excess Et3N soln. added to complex soln. at room temp., 30 s, FeCp2PF6 added, stirred for 10 min; solvent removed in vac., extracted with ether, ether removed in vac., FeCp2 and W-complex not separated (1:1 mixture) 97percent yield;